The lpres package provides a first construction of finitely L-presented groups and a nilpotent quotient algorithm for L-presented groups. The features of this package include: - creating an L-presented group as a new gap object, - computing nilpotent quotients of L-presented groups and epimorphisms from the L-presented group onto its nilpotent quotients, - computing the abelian invariants of an L-presented group, - computing finite-index subgroups and if possible their L-presentation, - approximating the Schur multiplier of L-presented groups.